WooCommerce Development Services from Senior WooCommerce Developers
Custom WooCommerce builds, performance and checkout work, and integrations that survive plugin updates. Senior engineers who also build on Shopify and BigCommerce, so the advice to stay on WooCommerce, fix it, or leave it is honest rather than pushed. Scoped pricing in writing after discovery.
An engineer reads this and replies. No mailing list, no drip sequence.
- Senior engineers only
- Multi-platform, honest advice
- London based
Our WooCommerce development process
- Audit. We read the store as it runs: theme and child theme, the plugin stack and what each plugin hooks, order storage mode (High-Performance Order Storage or legacy post meta). Then cron and background jobs, caching layers and the hosting profile. You get a written assessment of what is slow, what is fragile and what is worth keeping.
- Build. Custom theme and block work, checkout extensions on the Cart and Checkout blocks, Store API and REST API v3 integrations with ERP, PIM, accounting and marketing systems, and plugin replacements where a bespoke extension is cheaper to run than five plugins fighting each other.
- QA + UAT. Staging that mirrors production, regression on representative orders and payment flows, integration replays, and a performance budget checked before release. Plugin and WordPress core updates are tested on staging first, every time.
- Launch + support. Release in a low-traffic window with a rollback path, a monitoring period, and a scoped support agreement for updates and incidents, agreed in writing before the engagement closes.
What's included
- Custom WooCommerce theme and block development: bespoke templates, block-based cart and checkout, and the JavaScript and PHP work a stock theme cannot do
- Performance engineering: High-Performance Order Storage migration, query and object-cache tuning, plugin consolidation and image and script budgets
- Checkout customisation on the Cart and Checkout blocks: additional checkout fields, custom validation, payment and shipping method logic
- Integrations via the REST API v3 and the Store API: ERP, PIM, accounting, shipping and marketing systems wired with retries, idempotency and reconciliation reports
- Custom extensions built to WooCommerce compatibility standards, declared compatible with HPOS and the checkout blocks so core updates do not break them
- A senior engineer on every project: no junior-only teams, no offshore sub-contracting, with written architecture briefs you own
Project timeline
Scoped per project
Project shape decides duration. A performance and checkout fix typically lands in weeks, a custom theme or extension build in one to three months, and an integration programme depends on the systems involved. We confirm a window in writing once the audit surfaces the real shape.
FAQ
What should a WooCommerce developer know beyond WordPress?
The WooCommerce data model and its APIs. High-Performance Order Storage moves orders out of WordPress post meta into dedicated tables, so extensions must read and write orders through the WooCommerce APIs rather than post functions. The Store API powers the block-based cart and checkout and can be extended per endpoint, and the REST API v3 is the integration surface for orders, products and customers. A developer who only knows WordPress themes will build something that breaks on the next WooCommerce update.
Can you make a slow WooCommerce store fast?
Usually, and the audit tells you how far. The common causes we find: legacy order storage on large stores, plugins running queries on every page load, missing object caching, oversized images and scripts. Often the hosting was right at launch and is wrong at current traffic. We fix the causes in order of impact and check the result against a performance budget rather than a single speed score.
Do you build custom WooCommerce plugins and checkout extensions?
Yes. Custom extensions are built the way WooCommerce documents them. Compatibility is declared for High-Performance Order Storage and the Cart and Checkout blocks, checkout fields go through the additional checkout fields API, and the Store API is extended for the data the blocks need. That is what keeps a customisation working through core updates.
Which systems can you integrate with WooCommerce?
ERP and accounting (NetSuite, Xero, QuickBooks), PIM and product feeds, shipping and 3PL, email and CRM (Klaviyo, HubSpot), and custom internal systems. Integrations run against the REST API v3 or the Store API with retries, idempotent writes and reconciliation reports, because the failure mode in WooCommerce integrations is silent drift, not a crash.
What does WooCommerce development cost?
It depends on the shape of the work, and we quote in writing after the audit rather than guessing from a form. A fix-and-tune engagement, a custom build and an integration programme sit in different ranges. The audit tells us which one you need, and you see the number before anything is built.
Should I stay on WooCommerce or move to Shopify?
Honest answer: it depends, and because we build on both we have no reason to push you either way. If WooCommerce fits your catalogue, team and budget, we will build and fix your store on it. If you are spending more on plugin maintenance and hosting than on growth, our WooCommerce to Shopify migration page and the platform comparison lay out the trade-offs without spin.
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An engineer reads this and replies. No mailing list, no drip sequence.